If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u in (-oo:+oo)
10 = u/3-13 // - u/3-13
10-(u/3)+13 = 0
23-1/3*u = 0 // - 23
-1/3*u = -23 // : -1/3
u = -23/(-1/3)
u = 69
u = 69
| 5x+10=0.8 | | x(x)+13x+36=0 | | 5.95/0.85 | | -10n-10=-140 | | 3-40/8= | | 4=10+6x | | 14x+3=25 | | 4b-4=-76 | | 7z-11-4x=6 | | -5(u-6)=6u-3 | | -x^2-16x+y-73=0 | | 7m-7=-42 | | 65.10+0.85x= | | 15=-5(x+20) | | Y=73+16x+x^2 | | 19s-18s+3s=20 | | 6x+3=3x+97 | | ln(x)+ln(x+8)=ln(9) | | 4.8x+3=27 | | 48=4x+12 | | 12m=-58+118 | | -20=2(u+5)-7u | | 24+3x=18 | | 13m=-64+129 | | R+5r-5r+R=18 | | 2x+7x^2=0 | | 26-9x=108 | | 1c+8p=35 | | 72-4x=12 | | (-7x-6)(x-5)+(8x-9)(5-x)= | | X+2=30-15 | | 2x-8x+1=9+10x |